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Warren Automatic Tool Co

Warren Aut
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3994166A Apparatus for eliminating differential pressure surges Expired / Lapsed 1975-11-10 1976-11-30 19 Details
US3595075A Method and apparatus for sensing downhole well conditions i… Expired / Lapsed 1969-11-10 1971-07-27 11 Details
US2696111A Drill string weight indicating apparatus Expired / Lapsed 1951-02-02 1954-12-07 0 Details